Being into woodworking (lutherie specifically), I would kill for something that could identify species by samples of wood. I think this is a very different task and extremely difficult to achieve though. Sometimes even 2 experts disagree on the pedigree of a given piece of wood - visual inspection is simply not enough and nothing short of a detailed lab analysis can confirm some identifications. Variation of the wood from tree to tree of exactly the same species is large, at least you are dealing with relative consistency in the leaves.